Part Number: ADC128S102QML-SP
Hi,
I had some questions about using this ADC to sample data on several input channels. According to the datasheet Section 7.5.1 at power-up the ADC will start with a randomly selected channel. So, you need your first DIN input to be the desired channel to start reading known data from, and since the first channel at startup is random, the first DOUT should just be ignored.
However in Figure 1 reading continuous data is indicated with CS' constantly held low, even though there is a "Power Down" in the 16th SCLK cycle. I am assuming this is just a difference in wording between the two sections. Figure 1 also indicates that for continuous operation the DOUT data received is off from the DIN control register by 1 cycle (see DIN and DOUT lines and N / N+/-1 labels).
So, is the proper way to sample all 8 channels to hold CS' low always, use the first DIN to specify the first channel to read, throw away the first DOUT reading, and then from then on the ADC can increment through each channel, but the DOUT for one channel will always be one sample behind the DIN for that same channel?
Is this the same for the non-QML part?
Please let me know if any of these questions are unclear. Thanks!
-Chris
